## Search

Now showing items 171-180 of 180

#### Ideal Clutters

(University of Waterloo, 2018-04-24)

Let E be a finite set of elements, and let C be a family of subsets of E called members. We say that C is a clutter over ground set E if no member is contained in another. The clutter C is ideal if every extreme point of ...

#### The use of machine learning algorithms in recommender systems: A systematic review

(Elsevier, 2018-05-01)

Recommender systems use algorithms to provide users with product or service recommendations. Recently, these systems have been using machine learning algorithms from the field of artificial intelligence. However, choosing ...

#### A Novel Diffusion-based Empirical Mode Decomposition Algorithm for Signal and Image Analysis

(University of Waterloo, 2018-08-09)

In the area of signal analysis and processing, the Fourier transform and wavelet transform are widely applied.
Empirical Mode Decomposition(EMD) was proposed as an alternative frequency analysis tool.
Although shown to ...

#### A Variability-Aware Design Approach to the Data Analysis Modeling Process

(University of Waterloo, 2018-10-25)

The massive amount of current data has led to many different forms of data analysis processes that aim to explore this data to uncover valuable insights such as trends, anomalies and patterns. These processes support ...

#### The Capacitated Matroid Median Problem

(University of Waterloo, 2018-05-18)

In this thesis, we study the capacitated generalization of the Matroid Median Problem which is a generalization of the classical clustering problem called the k-Median problem. In the capacitated matroid median problem, ...

#### The Erdős Pentagon Problem

(University of Waterloo, 2018-12-20)

The Erdős pentagon problem asks about the maximum number of copies of C_5 that one can find in a triangle-free graph. This problem was posed in 1984, but was not resolved until 2012. In this thesis, we aim to capture the ...

#### An Experimental Analysis of Multi-Perspective Convolutional Neural Networks

(University of Waterloo, 2018-05-16)

Modelling the similarity of sentence pairs is an important problem in natural language processing and information retrieval, with applications in tasks such as paraphrase identification and answer selection in question ...

#### The Complexity of Network Design for s-t Eff ective Resistance

(University of Waterloo, 2018-08-23)

We consider a new problem of designing a network with small $s$-$t$ effective resistance.
In this problem, we are given an undirected graph $G=(V,E)$ where each edge $e$ has a cost $c_e$ and a resistance $r_e$, two ...

#### An Empirical Investigation to Understand the Difficulties and Challenges of Software Modellers When Using Modelling Tools

(ACM, 2018-10)

Software modelling is a challenging and error-prone task. Existing Model-Driven Engineering (MDE) tools provide modellers with little aid, partly because tool providers have not investigated users' difficulties through ...

#### Hilbert space operators with compatible off-diagonal corners

(Elsevier, 2018-08-15)

Given a complex, separable Hilbert space H, we characterize those operators for which ‖PT(I−P)‖=‖(I−P)TP‖ for all orthogonal projections P on H. When H is finite-dimensional, we also obtain a complete characterization of ...